package controller;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/logout")
public class LogoutServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //先找到当前用户信息的会话
        HttpSession session=req.getSession(false);
        if (session==null){
            //用户没有登录
            resp.getWriter().write("当前用户没有登录！无法注销");
            return;
        }
        //登录的话把会话中的用户信息删除即可
        session.removeAttribute("user");
        resp.sendRedirect("blog_login.html");
    }
}
